Geological science studies the processes that shape the Earth's surface, including the formation of iconic landmarks. One example is the Grand Canyon in Arizona, carved by the Colorado River over millions of years. Another is the Giant's Causeway in Northern Ireland, known for its impressive hexagonal basalt columns formed by volcanic activity. The rock formations known as hoodoos in Bryce Canyon National Park in Utah are another famous geological wonder, created by erosion and frost weathering. Moving to the oceans, the Great Barrier Reef off the coast of Australia is the largest coral reef system in the world, stretching over 2,300 kilometers. The Moeraki Boulders in New Zealand are spherical boulders scattered along Koekohe Beach, believed to have formed from sedimentary deposits over 60 million years. In Iceland, the impressive basalt rock formations of Reynisfjara Beach are a result of lava flowing into the ocean and rapidly cooling. The Door to Hell in Turkmenistan is a natural gas crater that has been burning since 1971 when it was accidentally lit on fire to prevent the spread of methane gas. These iconic geological formations showcase the incredible power and beauty of the Earth's processes, captivating visitors from around the world with their natural wonders and geological phenomena.